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proportional counter

   Also found in: Medical, Legal, Encyclopedia, Wikipedia 0.01 sec.
proportional counter
n
(Physics / General Physics) an instrument for detecting and measuring the intensity of ionizing radiation. It is similar to a Geiger counter but operates at a lower potential difference such that the magnitude of the discharge is directly proportional to the number of gas molecules ionized by the detected particle. This may permit the identification of the particle or the determination of its energy
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.proportional counter - counter tube whose output pulse is proportional to number of ions produced
proportional counter tube
boron counter tube - a proportional counter tube for counting neutrons
counter tube - a measuring instrument for counting individual ionizing events


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